Binding of Anionic Surface-Active Substances by Water Soluble Humic Acids

The interaction of anionic SAS with water-soluble humic substances has been studied. The quantitative characteristics of this interaction (binding constants) were calculated and the impact of various factors on the specified interaction was estimated. The binding of anionic SAS by humic substances was found to depend on the contact duration, ambient temperature, concentration, the nature, and size of molecules of humic substances, and also on the nature and length of the hydrocarbon radical of ASAS molecules.